Rolling bearing unit with sensor

Abstract

A four-row cylindrical roller bearing is incorporated into between the inner peripheral surface of a housing and the outer peripheral surface of a backup roller. A sensor unit 7 is held in a portion of a collar disposed in the axial-direction end portion of the four-row cylindrical roller bearing. The sensor unit comprises a detect part for detecting temperatures and vibrations and a transmitter device for transmitting signals, which are obtained after output signals taken out from the detect part are processed, as radio signals. On a portion of a hold cover which is a separate member from the collar, there is disposed a receive antenna which is part of a receiver apparatus for receiving the radio signals transmitted by the transmitter device.

Description

BACKGROUND OF THE INVENTION[0001] The present invention relates to a rolling bearing unit with a sensor for use in the rotation support part of a machine which, when a large load is applied thereto to thereby damage the bearing thereof suddenly, requires a lot of labor and time to replace the damaged bearing with a new one, or for use in the rotation support part of a large-sized machine which includes a large number of rotation support parts and thus needs to control the starting times of use of the respective bearings, such as the rotation support part of a rolling roller used in a rolling mill for iron and steel or the rotation support part of various rollers used in a paper manufacturing machine.[0002] For example, in the case of a rolling bearing to be used in the rotation support part of a machine which, in case where a large load is applied thereto to thereby damage its bearing unexpectedly, requires a great deal of labor and time to recover the damaged bearing such as a roll...

AI Technical Summary

Benefits of technology

0016] With use of the above-structured rolling bearing unit with a sensor according to the invention, the results, which are represented by the output signals taken out from the detect part or the signals obtained after the present output signals are processed, can be output to the output portion of an output device disposed on the receiver device side or to the output portion of the external input/output device, thereby allowing the operation manager to confirm easily whether any abnormal condition is present in the rolling bearing or not. Also, there is eliminated the need to guide out a harness or a cable, which is used to take out the above signals, from a member for fitting and fixing an outer ring or an inner ring, which makes it possible to facilitate the replacement of the member for fitting and fixing the outer ring or inner ring and the rolling bearing.

0017] Also, since the sensor unit is disposed on a portion of the rolling bearing, the accuracy of detection of the temperatures and vibrations of the rolling bearing can be enhanced. The output device or external input/output device, which is used to notify the operation manager of presence or absence of an abnormal condition in the rolling bearing i...

Problems solved by technology

For example, in the case of a rolling bearing to be used in the rotation support part of a machine which, in case where a large load is applied thereto to thereby damage its bearing unexpectedly, requires a great deal of labor and time to recover the damaged bearing such as a rolling bearing for supporting a roller neck for supporting the rolling roller of a rolling mill for iron and steel, it is necessary to prevent such unexpected damage of the bearing.

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